<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>充电动画</title>
  <style>
    body{
      /* 100%窗口高度 */
      height: 100vh;
      border-color: #000;
    }
    .box{
      width: 800px;
      height: 100%;
      margin: 0 auto;
      position: relative;
    }
    /* 充电百分比 */
    .number{
      color: #fff;
      position: absolute;
      z-index: 1;
      width: 200px;
      height: 200px;
      line-height: 200px;
      text-align: center;
      font-size: 30px;
      left: 50%;
      top: 25%;
      margin-left: -100px;
    }
    .contrast{
      width: 100%;
      height: 100%;
      background-color: #000;
      position: relative;
      /* 设置对比度 */
      filter: contrast(15);
      /* 执行动画  动画名  时长 线性的  无限次播放  */
      animation: hueRotate 5s linear infinite;
    }
    @keyframes hueRotate {
      0%{
        /* contrast是设置对比度,hue-rotate是颜色滤镜,通过设置度数来改变颜色 */
        filter: contrast(15) hue-rotate(0);
      }
      100%{
        filter: contrast(15) hue-rotate(360deg);
      }
    }
    .circle{
      width: 300px;
      height: 300px;
      position: absolute;
      top: 20%;
      left: 50%;
      margin-left: -150px;
      /* 设置模糊度,配合上面的contrast可以产生粘性效果 */
      filter: blur(8px);
      /* 执行动画 */
      animation: circleRotate 5s linear infinite;
    }
    /* 圆旋转动画 */
    @keyframes circleRotate{
      0%{
        transform: rotate(0);
      }
      100%{
        transform: rotate(360deg);
      }
    }
    /* 外圆 */
    .circle::before{
      content: "";
      width: 200px;
      height: 200px;
      background-color: cyan;
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%,-50%);
      border-radius: 42% 38% 63% 49% / 45%;
    }
    /* 中心圆(黑色) */
    .circle::after{
      content: "";
      width: 178px;
      height: 178px;
      background-color: #000;
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%,-50%);
      border-radius: 50%;
    }
    /* 冒泡的底座 */
    .bubble-home{
      width: 100px;
      height: 40px;
      background-color: cyan;
      position: absolute;
      left: 50%;
      bottom: 0;
      margin-left: -50px;
      border-radius: 100px 100px 0 0;
      filter: blur(8px);
    }
    .bubble{
      width: 20px;
      height: 20px;
      background-color: cyan;
      border-radius: 100%;
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      z-index: 2;
      filter: blur(5px);
      /* 执行动画  动画名  时长 加速后减速  无限次播放  */
      animation: bubbleUp 5s ease-in-out infinite;
    }
    /* 冒泡动画 */
    @keyframes bubbleUp{
      0%{
        bottom: 0;
      }
      100%{
        bottom: calc(80% - 260px);
      }
    }
    /* 接下来为每一个泡泡设置大小\位置\动画时长\动画延迟时间 */
    .bubble:nth-child(1){
      width: 20px;
      height: 20px;
      left: 50%;
      animation-duration: 5s;
      animation-delay: 1s;
    }
    .bubble:nth-child(2){
      width: 22px;
      height: 22px;
      left: 49%;
      animation-duration: 4s;
      animation-delay: 2s;
    }
    .bubble:nth-child(3){
      width: 24px;
      height: 24px;
      left: 47%;
      animation-duration: 3s;
      animation-delay: 3s;
    }
    .bubble:nth-child(4){
      width: 18px;
      height: 18px;
      left: 53%;
      animation-duration: 3s;
      animation-delay: 4s;
    }
    .bubble:nth-child(5){
      width: 26px;
      height: 26px;
      left: 51%;
      animation-duration: 4s;
      animation-delay: 5s;
    }
  </style>
</head>
<body>
  <div class="box">
    <div class="number">99.6%</div>
    <div class="contrast">
      <div class="bubble"></div>
      <div class="bubble"></div>
      <div class="bubble"></div>
      <div class="bubble"></div>
      <div class="bubble"></div>
      <div class="bubble-home"></div>
      <div class="circle"></div>
    </div>
  </div>
</body>
</html>